What is high pitch in 1fz-fe when rpm is about 400 rpm?

In the context of the 1FZ-FE engine, "high pitch" typically refers to the sound frequency produced by the engine at a specific RPM, which in this case is approximately 400 RPM. At this low RPM, the pitch would generally be considered low rather than high, as engine sounds tend to increase in frequency (or pitch) with higher RPMs. If you are referring to a specific issue or characteristic at this RPM, additional context would be needed for a more precise explanation.